How to terminate a running script

The only way I know is to close Mushclient. Is there a function I can use to terminate a running script (like an infinite loop or a series of commands)? Thanks.

MUSHclient is entirely single-threaded, with some minor exceptions. When a script executes, the client must wait for it to end before it can continue. This means that the GUI, too, is tied up. There's no way to get a message in to say "Hey, kill the script, it's been going way, way too long."

It can be done reasonably well:

Brilliant. Thanks!